So wrapper oils/ sheen equate to flavor, how does aging factor into these oils? I've been reading posts where 'elbows', 'youngness', 'mongrel', 'rough edges', etc. to describe fresh CC, do oils factor into this or something else? My assumption is that oils evaporate, breakdown, or degrade as they age and that is why there is a point of no return for aging cigars, so perhaps some oils are more volatile than others and these more volatile oils cause the roughness?

It appears that wrapper shade (dark and oily vs pale and dry) is one of the key factors in PSP/HQ/PE grading of a box. Obviously everything comes down to personal tastes but this suggests more people are willing to pay a premium for the darker oily wrappers. Why? Do these dark oily wrappers equate to better experience in majority of the people?